The Games of the Nineteenth Olympiad were the highest and most controversial ever held.

Staged at 7,349 feet above sea level where the thin air was a major concern to many competing countries, the Mexico City Olympics were another chapter in a year buffeted by the Vietnam War, the assassinations of Martin Luther King and Robert Kennedy, the Democratic Convention in Chicago, and the Soviet invasion of Czechoslovakia.

Ten days before the Olympics were scheduled to open on Oct. 12, over 300 Mexico City university students were killed by army troops when a campus protest turned into a riot. Still, the Games began on time and were free of discord until black Americans Tommie Smith and John Carlos, who finished 1-3 in the 200-meter run, bowed their heads and gave the Black Power salute during the national anthem as a protest against racism in the U.S.

They were immediately thrown off the team by the USOC.

The thin air helped shatter records in every men's and women's race up to 1,500 meters and may have played a role in U.S. long jumper Bob Beamon's incredible gold medal leap of 29 feet, 21/2 inches –beating the existing world mark by nearly two feet.

Other outstanding American performances included Al Oerter's record fourth consecutive discus title, Debbie Meyer's three individual swimming gold medals, the innovative Dick Fosbury winning the high jump with his backwards “flop” and Wyomia Tyus becoming the first woman to win back-to-back golds in the 100 meters.